I purchased my dinker male in late November of 2010. He was under 100g (I think around 80-90g but I'd have to go back and check). He is now around 215g (at last weigh in, empty) and eating like a machine. He downs 1 large mouse every week. Just the other day I decided to check his sex just to be sure. Next season is right around the corner and I want to breed him to one of my normal girls once he's big enough. I popped him and out came what I think might be a sperm plug. I've gotten them from my larger males before and this was identical to a sperm plug. Is it possible for him to be producing sperm when he's this small? He's around a year old now.